The social life of Second Life is available by looking at Search > Events, where all public events are commonly listed. You can also take a look at the SL Forums (http://forums.secondlife.com) where often special attractions are announced.

Look at the time they're being announced and remember, events in SL are noted in Pacific Standard Time or Pacific Daylight Savings Time by default (it's the easiest clock to schedule any events by in SL - just look at the upper-right corner of your client).